Shuttle.



A'u NITED sTATEs PATENT oEFIeE.

yartisan GEANZ, or PLAUEN, GERMANY, Assioma To voGTLNDIscHE MASCHINEN- EAEEIK, or PLAUEN, GERMANY.

SHUTTLE.

Specification of Letters Patent.

Patented Ma-v 9. 1916.

Application filed August 28, 1914. Serial No. 859,078.

Toa whom t may concern.'

ject ofthe German Emperor, residing atrPlauen, in IVogtland, in the Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Shuttles,

of which the following is a specification.

The present invention relates to shuttles l for embroidering machines and consistsin then novel l construction of an embroidery shuttle. As hitherto constructed theback of the shuttle rises from its pointed end more'or less gradually to a maximum height which is located behind the middle and near the rear end of the shuttle and thence curves down abruptly.. When numerous shuttles of such structure pass through the needle loops a sudden vigorous jerk is produced at the last moment. This is due to the fact that when the outrunning shuttle has almost advanced to the end of its stroke, the needle loop engaging around it has not yet reached the highest point-but still travels on the rising portion of the shuttle. Only just at the very end of the stroke the loop arrives at the highest point and drops down very suddenly. By reason of this fact the needle necessarily must remainV a comparatively longer period in vits deepest position, and only an extremely short time is left for its return movement, in consequence of which the machine is vigorously shaken. quently, also owing to the loop being strongly tensioned before it drops oil' the shuttle breakage of thread is occasioned.

The object of my invention is to obviate the grave drawbacks above referred to.

In the accompanying drawing which forms part of this specification and in which similarl reference characters denote correspondmg parts the figure illustrates a side view of my' new shuttle.

The shuttle a is so constructed that the back thereof rises at an acute angle to a point a which is located on a line y and which is in advance of the middle of the shuttle indicated by the dotted line then from that point a tapers gradually toward the rear and inally drops in an abrupt curve to the bottom of the shuttle. the needle thread loop b will by itself slide ofi' the back of the shuttle without danger of breaking. Furthermore, another more important advantage of the new structure is that the return movement of the needle may be much smoother because the needle c may begin its retreat at Vthe moment the loop reaches its highest point at a. of the shuttle. It is of course understood that the taper of the back behind the highest point a may be made more gradual than shown.

What I claim and desire to secure by Letters Patent is:

As an article of manufacture, an embroidery machine shuttle, of which the back rises from the pointed end at an acute angle to a point located in advance of the middle vertical line of the shuttle, then from that point tapers gradually down toward the rear and is curved abruptly toward the bottom of the shuttle, substantially as and for the purpose set forth.

In testimony whereof I afliX my signature in presence of two witnesses. v

' JOSEF GRANZ.

Witnesses: y

JOSEPH MIEHLE, ROBERT H. Niso.

@epics of this patent may be obtained for ve cents Yeach, by addressing the Gommiliioner at Patents, Washington, B. U."

Consequently 4 

